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Questions and Answers
What is the primary function of interphase?
What is the primary function of interphase?
- Cell division
- Chromatin condensation
- DNA replication
- Cell growth and function maintenance (correct)
Neurons and muscle cells are capable of dividing and regenerating.
Neurons and muscle cells are capable of dividing and regenerating.
False (B)
What happens to DNA at the end of interphase?
What happens to DNA at the end of interphase?
DNA replicates
During mitosis, the parent cell produces two identical __________.
During mitosis, the parent cell produces two identical __________.
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Match the cell types with their regeneration frequencies:
Match the cell types with their regeneration frequencies:
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Study Notes
Cell Life Cycle Duration
- Cell lifespan varies greatly depending on tissue type.
- Epithelial cells (skin, intestines) regenerate every few days.
- Liver cells regenerate every 1.5 years.
- Neurons and muscle cells never divide.
Interphase
- The longest stage of a cell's life.
- During interphase, cells:
- Increase in size.
- Grow their organelles and cytoplasm.
- Carry out their normal functions, such as absorbing nutrients, photosynthesis, storing reserves, and producing energy.
- Replicate their DNA in preparation for mitosis.
Mitosis
- A short phase where the cell divides.
- Through mitosis:
- A parent cell produces two identical daughter cells.
- Cell number increases, leading to body growth.
- Dead cells are replaced.
- Damaged tissues are repaired.
- Millions of new cells are produced every second.
Chromosomes and the Cell Cycle
- Chromosomes are only visible during mitosis.
- During interphase, chromosomes are unraveled and exist as chromatin.
- When mitosis begins, chromatin condenses, forming visible chromosomes.
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